Find the size of the matrix. Identify if it is a square, column, or row matrix.

[tex]\[ \left[\begin{array}{r} -9 \\ -8 \end{array}\right] \][/tex]

The size of the matrix is [tex]\(\boxed{2} \times \boxed{1}\)[/tex].

This is a column matrix.



Answer :

Given the matrix:
[tex]\[ \left[\begin{array}{r} -9 \\ -8 \end{array}\right] \][/tex]

we need to determine its size and identify whether it is a square, column, or row matrix. To start, let's analyze the structure of the matrix.

### Step-by-Step Solution:

1. Count the number of rows: The matrix has two entries in a vertical line. Each entry in a vertical line represents a row.
[tex]\[ \begin{array}{|c|} -9 \\ \hline -8 \\ \hline \end{array} \][/tex]
It's visible that we have 2 rows.

2. Count the number of columns: The matrix has values only in a single vertical line, meaning there is only one entry horizontally across.
This shows us that there is 1 column.

3. Determine the size of the matrix: The size of the matrix is given by the number of rows by the number of columns. Thus, for this matrix:
[tex]\[ \text{Size of the matrix} = 2 \times 1 \][/tex]

Since the matrix has 2 rows and 1 column, its size is [tex]\(2 \times 1\)[/tex]. It exhibits the characteristic of being a column matrix because the number of rows is greater than the number of columns.

### Conclusion:
The given matrix
[tex]\[ \left[\begin{array}{r} -9 \\ -8 \end{array}\right] \][/tex]
is a column matrix with a size of [tex]\(2 \times 1\)[/tex].